What is the reason for urine occult blood?

Urinary occult blood 1+ indicates the presence of hematuria, which is considered to be related to trauma, urinary system diseases and systemic

diseases.1. Trauma

accident or violent beating, resulting in bladder and kidney damage, can directly cause

hematuria.2. Urinary system diseases

with acute glomerulonephritis, urethritis, cystitis, pyelonephritis or urinary tract stones and other urinary system diseases, can lead to urinary tract mucosal damage, resulting in

hematuria.3. Systemic diseases

with aplastic anemia, epidemic hemorrhagic fever, lupus nephritis, purpura nephritis and other systemic diseases can directly or indirectly cause kidney damage, resulting in hematuria.